Question
अवकल समीकरण $(1 + {x^2})\frac{{dy}}{{dx}} = x$ का हल है
==> $\int {dy} = \int {\frac{x}{{1 + {x^2}}}dx} + c$ ==> $y = \frac{1}{2}{\log _e}(1 + {x^2}) + c$.
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| अंक | $2$ | $3$ | $5$ | $7$ |
| बारंबारता | $( x +1)^{2}$ | $2 x -5$ | $x ^{2}-3 x$ | $x$ |
तो अंकों का माध्य है